To check if the point (5, 6) is a solution to a linear system of equations, you need to substitute the coordinates \( x = 5 \) and \( y = 6 \) into both equations of the system. Therefore, the correct approach is:
Substitute 5 in for x and 6 in for y in both of the equations to see if both equations are true.
If the point satisfies both equations (i.e., both equations hold true after substitution), then (5, 6) is a solution to the linear system.